Furnace-draft-door control



G. F. HOLLER AND E. SCHMIDT. FURNACE DRAFT DOOR comm."

APPLICATION FILED MAY 14, 192i- 1,438,037. Patented Dec. 5,1922.

Aware;

Patented Dec. 5, i922 than? F ear otates.

cnonenr. nouns, or crncnvnarr, OHIO, Ann Brain scniurnr. oroovnve'ron, KENTUCKY, ASSIGNORS TO 'r-nn nonrroa s'rovnconrann or GINGINNATI,

OHIO, A CORPORATION OF OHIO.

FURNACE-DBAFT-DOOB CONTROL.

Application filed May 14,

T all whom it maiy 00mm.-

Be it known that we, GEORGE F. HOLLER, a citizen of the United States, and residing in Cincinnati, in the county of Hamilton, State of Ohio, and EMIL SCHMIDT, a citizen of the United States, and residing at Covington, inthe county of Kenton and State of Kentucky, have invented a new and useful. Improvement in. Furnace-Draft-Door Controls, of which the following specification is a full disclosure. i j

Our invention relates' to an improvement in furnace draft door controlling mechanism, for'o' 'aerating'the' doors at the register of the furnace. r

An object of the invention is to provide a furnaceregister with means for operating and controllably setting the draft doors of 1 the furnace, 'Whereby'the 'draft door control lingmechanism isincorporated in the furnace structure. This offers many. advantages' in-the' manufacture and installation offu'rn'a'ces, and when 'applied to the fioor register of the type of furnace commercially known as pipeless, provides very appropriate and convenient location for the draft door controlling mechanism and en-' ables the standardizing of these parts for all installations.

Other objects of the invention relate to the construction of the draft door controlling mechanism, and to its combination with the floor register of the furnace, all of which Will be more fully set forth in the descrip-- tion of the accompanying drawing, forming a part of this application, and in the drawing like characters of reference denote corresponding parts throughout the several views, of which:

Fig. 1 is a side elevation of a hot-air furnace represented as of a pipeless type, with our improved draft control applied in position for use.

Fig. 2 is an enlarged side elevation of the 46 lever mechanism as applied to the floor register grid for operating the draft doors.

' Fig. 3 is a top plan view of a portion of the floor register.

Fig. 4 is a central vertical section of the 50 lever mechanism and floor register plate.

Referring to the drawing, 1 indicates a hot-air furnace of the pipeless type in which the furnace air conductor casing 52 extends vertically from the top of the fur- 1221. Serial no. 469,675.

'na'ce to' the building floor above. The cas ing 2 terminates with a floorregister or grid-plate 3, having a floor connection flush" with the surface plane of the floor. The ash-pit door 4 of the furnace is. provided with a draft door 5 andthe' furnace stack pipe. 6 with a check draft door 7, as parts of a general hot-air furnace; equipment. The functionsof the draft doors are well known to the art and the improvement here in is directed to theoperation and control of the" doors. I The mechanism for operating the doors is arranged to provide for an alternate openingv or'closing of the doors or Y permitting both' to be closed at the same time to meet the general requirements" for furnace draft regulation.

A chain or pull cord 8, at one end,.con I nects the front draft doormandits opposite end-With one arm of't'he bell crank lever 9,

pivotally connected to a bracket screw 10,

depending-1y secured frofn the' floor 11'. The

opposite or second arm. of the bell-Y crank lever 9- connects'w'ith' oneendiofa cord or chain 12 ascross connection, andlthezop posite ends of said chain 1 connectwith one arm of'a secondi bellc'ranklever '13ipivotally mounted uponabracket screw 13 depend ingly secured from the floor 11 appropriately above the check draft door. 7. The second. arm of the bell crank lever 13 connects with the draft door 7 by a chain or cord 14. Both draftdoors are thus inoperative connection, and while the arrangement shown is preferable,-. the connection a may be by means of a continuous cord or chain between the doors, guided over rollers to present an lntermed ate portion .in a

horizontal line for connection with the actuating mechanism therefor.

The register floor plate isprovided with a rectangular guide pocket 15, the base of the frame portion of the plate forming thehaving an elongated slot 16 there- A. tread slide block 17 is slidably engaged in the pocket, the saidblock having a rounded knurled or serrated upper face, providing a tread gripping surface to be engaged by the foot of the'operator, for shifting the block. Theblock has its outer side recessed to provide a socket for an end of a'link 18 pivotally connected pocket through.

v to the block by a pin 19. The link 'l8jprojects through the slot 16in the register floor plate and piv- V I otally connects at 20 with the link 21 of the pivotal y secured dependir bracket 22, secured to the under side of the register floor plate. The linlr 18 is also loosely pivoted to the bracket by means of a pin fined to the bracket and extending through an oblong slot 2% in the link. similar connection is provided for pirotally mounting the link 21 to the bracket, comprising a pin fixed to and projecting from the bracket 22 engaged through an oblong slot 26 in the linlr 21. The lower face of the slide block casing is notched as at 226 to provide setting points for maintaining the draft door regulating mechanism in its adjusted positions. A. spring tensioned catch member 27', consisting of a ll-bent plate, engages over the link as a detent and its terminals engage with the notched under surface 26*, retaining the link and parts connected thereto in their shifted positions. This provides a yielding ratchet check or simple and durable construction. The link 21, at its lower free end connects to the cross cord or chain 12. As the slide or tread block 17 is slid from one end position of the pocket to the opposite end, the links l8-and 21 are approximately rocked, pulling the cord chain connection with the draft doors for the desired 'dratt door regulation.

This enables the draft door actuating mechanism to be connected to, the register floor plate, providing a convenient and definite location therefor, establishing unifornr ity in the installation of the furnaces, as well as simplifying the installation at a reduced cost over the methods now in general practice for mounting the draft door i esp-sv regulating mechanism upon the room baseboard.

Having described our invention, We claim:

.1. In a device of the character described, a furnace floor register, furnace draft door actuating meansinountod on one side of the floor register, comprising a slide-block slidably mounted in a pocket opening through said register and manually accessible from the iaceside of the register, and a lever mechanism mounted upon said register, connecting wit i said slide-block and adapted to be connected with the draft doors of the furnace for controlling the doors atthe register.

2., In a device of the character described, a furnace floor register, furnace draft door actuating means mounted on one side of the floor reg'ster, comprising a slide-block slidably mounted in a pocket opening through said register and manually accessible from the face side of the register, lever mechanism mounted upon said register, connecting with said slide-block and adapted to be connected with the draft doors of the furnace for controlling the doors at the register, and spring tensioned ratchet check means for said block and lever mechanism for maintaining the same in any adjusted position.

In witness whereof, We hereunto subscribe our names, as attested by, the two subscribing Witnesses. GEORGE F. HOLLER.

EMIL SCHMIDT V fitnesses H. E. BURDGE, L. A. BnoK, 

